Reactions of Sn(NMe2)2 with alkali-metal tert-butylphosphidestBuPHM (M = Li, Na, K): Evidence for metal-induced modification of the tin(II) phosphinidene anions

Felipe García, Jörg P. Hehn, Richard A. Kowenicki, Mary McPartlin, Christopher M. Pask, Alexander Rothenberger, Matthew L. Stead, Dominic S. Wright*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

The 1:2 or 1:3 stoichiometric reactions of Sn(NMe2)2 with tBuPHM (M = Li, Na, K) in THF give the heterometallic alkali-metal/Sn(II) phosphinidene cages [{Sn2(PtBu) 3}2Li4·4THF] (1), [{Sn 3(FtBu)4}Na·3THF]--[Na(THF) 6]+ (2), [{Sn3(FtBu) 4}2(K·THF)3]-[K(THF) 6]+ (4), and [{Sn4(FtBu)5}K 2·5THF] (5) (THF = C4H8O). The 2:3 → 3:4 → 4:5 numerical progression observed in the Sn(II):P tBu ratios of the [{Sn2(FtBu)3} 2]4-, [{Sn3(FtBu)4}] 2-, and [{Sn4(FtBu)5}]2- anions of these complexes is dependent on the alkali-metal countercations present. The fact that the Lewis base donor has no effect on the resulting Sn(II) phosphinidene anions is indicated by the formation of the PMDETA-solvated complex [{Sn3(FtBu)4}Na2⋯ 2PMDETA-THF] (3) (PMDETA = (Me2NCH2CH2) 2NMe) in the 1:2 reaction of Sn(NMe2)2 with tBuPHNa in the presence of PMDETA (containing the same [{Sn 3(FtBu)4}]2- dianion as found in 2). The syntheses and X-ray structures of the new complexes 2-5 are discussed in relation to those of the previously reported complex 1.

Original languageEnglish (US)
Pages (from-to)3275-3281
Number of pages7
JournalOrganometallics
Volume25
Issue number13
DOIs
StatePublished - Jun 19 2006

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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